KEY_UP                  = "up"
KEY_DOWN                = "down"
KEY_RIGHT               = "right"
KEY_LEFT                = "left"
KEY_INSERT              = "insert"
KEY_HOME                = "home"
KEY_END                 = "end"
KEY_PAGEUP              = "pageup"
KEY_PAGEDOWN            = "pagedown"
KEY_BACKSPACE           = "backspace"
KEY_DELETE              = "delete"
KEY_TAB                 = "tab"
KEY_ENTER               = "enter"
KEY_PAUSE               = "pause"
KEY_ESCAPE              = "escape"
KEY_SPACE               = "space"
KEY_KEYPAD0             = "keypad0"
KEY_KEYPAD1             = "keypad1"
KEY_KEYPAD2             = "keypad2"
KEY_KEYPAD3             = "keypad3"
KEY_KEYPAD4             = "keypad4"
KEY_KEYPAD5             = "keypad5"
KEY_KEYPAD6             = "keypad6"
KEY_KEYPAD7             = "keypad7"
KEY_KEYPAD8             = "keypad8"
KEY_KEYPAD9             = "keypad9"
KEY_KEYPAD_PERIOD       = "keypad_period"
KEY_KEYPAD_DIVIDE       = "keypad_divide"
KEY_KEYPAD_MULTIPLY     = "keypad_multiply"
KEY_KEYPAD_MINUS        = "keypad_minus"
KEY_KEYPAD_PLUS         = "keypad_plus"
KEY_KEYPAD_ENTER        = "keypad_enter"
KEY_CLEAR               = "clear"
KEY_F1                  = "f1"
KEY_F2                  = "f2"
KEY_F3                  = "f3"
KEY_F4                  = "f4"
KEY_F5                  = "f5"
KEY_F6                  = "f6"
KEY_F7                  = "f7"
KEY_F8                  = "f8"
KEY_F9                  = "f9"
KEY_F10                 = "f10"
KEY_F11                 = "f11"
KEY_F12                 = "f12"
KEY_F13                 = "f13"
KEY_F14                 = "f14"
KEY_F15                 = "f15"
KEY_F16                 = "f16"
KEY_F17                 = "f17"
KEY_F18                 = "f18"
KEY_F19                 = "f19"
KEY_F20                 = "f20"
KEY_SYSREQ              = "sysreq"
KEY_BREAK               = "break"
KEY_CONTEXT_MENU        = "context_menu"
KEY_BROWSER_BACK        = "browser_back"
KEY_BROWSER_FORWARD     = "browser_forward"
KEY_BROWSER_REFRESH     = "browser_refresh"
KEY_BROWSER_STOP        = "browser_stop"
KEY_BROWSER_SEARCH      = "browser_search"
KEY_BROWSER_FAVORITES   = "browser_favorites"
KEY_BROWSER_HOME        = "browser_home"